塔中白云岩岩溶储层地震正演模拟及其响应
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摘要
针对塔中地区埋深在5 000 m以下白云岩岩溶储层发育的类型和特点,通过建立的2种随机地震地质模型和1种实钻井随机模型,采用弹性波传播交错网格高阶差分模拟方法,分别模拟了基于实际介质模型条件和当岩溶储层孔缝洞内充填物性质发生变化时的地震波场响应.结果表明,对于单层储层厚度大于7 m、子波频率为20~30 Hz的地震响应表现为弱反射能量或呈现峰-谷-峰似串珠状的弱反射特征,当充填物性质由致密到疏松、流体含量增多或子波频率提高时,其串珠状反射能量和强度也明显增强.另外模拟结果还揭示,地震对大于7 m的单层储层厚度的分辨能力远大于存在薄夹层的具有相同叠加储层厚度的情况.
Two stochastic seismic-geological models and one stochastic model for well Zh1 are set up based on the type and characteristics of dolomite Peleokarst reservoir(depth>5 000 m) in Tazhong area,China.Using high-order finite difference method of first-order elastic wave equation,the seismic forward modeling is carried out to determine the seismic response.The results show seismic response is characterized by peakvalley-peak which is like strings of beads when thickness of peleokarst reservoir is not less than 7 m and the wavelet frequency changes from 20 to 30 Hz.The reflection amplitude and strength increases obviously if the filled materials become softer and even become the fluid content or the wavelet frequency increases.It also reveals that seismic resolving power for a single layer of peleokarst reservoir is better than that with a stack of peleokarst reservoir beddings of the same net thickness.
Two stochastic seismic-geological models and one stochastic model for well Zh1 are set up based on the type and characteristics of dolomite Peleokarst reservoir(depth>5 000 m) in Tazhong area,China.Using high-order finite difference method of first-order elastic wave equation,the seismic forward modeling is carried out to determine the seismic response.The results show seismic response is characterized by peakvalley-peak which is like strings of beads when thickness of peleokarst reservoir is not less than 7 m and the wavelet frequency changes from 20 to 30 Hz.The reflection amplitude and strength increases obviously if the filled materials become softer and even become the fluid content or the wavelet frequency increases.It also reveals that seismic resolving power for a single layer of peleokarst reservoir is better than that with a stack of peleokarst reservoir beddings of the same net thickness.
引文
[1]王兴荣.中1井奥陶系碳酸盐岩油气藏特征分析[J].江汉石油学院学报,2004,6(3):61.WANG Xingrong.Carbonate rock pool analysis in Ordovician forwell Zh1[J].Journal of Jianghan Petroleum Institute,2004,6(3):61.
[2]田纳新,徐国强,李学永,等.塔中地区早海西期风化壳古岩溶控制因素分析[J].江汉石油学院学报,2004,26(2):61.TIAN Naxin,XU Guoqiang,LI Xueyong,et al.Analysis of con-trol factors of weathering crust palaeokarst in early hercynian ofTazhong area[J].Journal of Jianghan Petroleum Institute,2004,26(2):61.
[3]闫相宾,李铁军,张涛,等.塔中与塔河地区奥陶系岩溶储层形成条件的差异[J].石油与天然气地质,2005,26(2):202.YAN Xiangbin,LI Tiejun,ZHANG Tao,et al.Differences be-tween formations of ordovician karstic reservoirs in Tazhong andTahe areas[J].Oil and Gas Geology,2005,26(2):202.
[4]王宏语,樊太亮,高志前,等.塔中地区奥陶纪古地貌及其对储集层的控制作用[J].新疆石油地质,2007,28(1):15.WANG Hongyu,FAN Tailiang,GAO Zhiqian,et al.Palaeokarstgeomorphology and its controlling to reservoir in Ordovician atTazhong Area[J].Xinjiang Petroleum Geology,2007,28(1):15.
[5]赵宗举,周新源,陈学时,等.塔中地区中晚奥陶世古潜山岩溶储集层特征[J].新疆石油地质,2006,27(6):660.ZHAO Zongju,ZHOU Xinyuan,CHEN Xueshi,et al.Character-istics of PaleoKarst reservoirs of Middle-Late Ordovician inTazhong Area,Tarim Basin[J].Xinjiang Petroleum Geology,2006,27(6):660.
[6]钱一雄,邹远荣,陈强路,等.塔里木盆地塔中西北部多期、多成因岩溶作用地质-地球化学表征——以中1井为例[J].沉积学报,2005,23(4):596.QIAN Yixiong,ZOU Yuanrong,Chen Qianglu,et al.Geoligicaland geochemical implications for multi-period and origin of car-bonate karstification in the northwestern Tazhong:taking WellZh1 as an example[J].Acat Sedimentologica Sinica,2005,23(4):596.
[7]钱一雄,尤东华.塔中地区西北部奥陶系白云岩(化)成因分析[J].新疆石油地质,2006,27(2):146.QIAN Yixiong,YOU Donghua.An analysis of Ordoviciandolomitisation origin in northwestern Tazhong area[J].XinjiangPetroleum Geology,2006,27(2):146.
[8]牟永光,斐正林,著.三维复杂介质地震数值模拟[M].北京:石油工业出版社,2005.MOU Yongguang,FEI Zhenglin.Seismic numerical modeling for3-D complex media[M].Beijing:Petroleum Industry Press,2005.
[9]董良国,马在田,曹景忠,等.一阶弹性波方程交错网格高阶差分解法[J].地球物理学报,2000,43(3):411.DONG Liangguo,MA Zaitian,CAO Jingzhong,et al.A staggered-gridhigh-order difference method of one-order elastic wave equation[J].Chinese Journal of Ceophysics,2000,43(3):411.
[10]董良国,马在田,曹景忠.一阶弹性波方程交错网格高阶差分解法稳定性研究[J].地球物理学报,2000,43(6):856.DONG Liangguo,MA Zaitian,CAO Jingzhong.A study on sta-bility of the staggered-grid high-order difference method of first-order elastic wave equation[J].Chinese Journal of Ceophysics,2000,43(3):856.
[2]田纳新,徐国强,李学永,等.塔中地区早海西期风化壳古岩溶控制因素分析[J].江汉石油学院学报,2004,26(2):61.TIAN Naxin,XU Guoqiang,LI Xueyong,et al.Analysis of con-trol factors of weathering crust palaeokarst in early hercynian ofTazhong area[J].Journal of Jianghan Petroleum Institute,2004,26(2):61.
[3]闫相宾,李铁军,张涛,等.塔中与塔河地区奥陶系岩溶储层形成条件的差异[J].石油与天然气地质,2005,26(2):202.YAN Xiangbin,LI Tiejun,ZHANG Tao,et al.Differences be-tween formations of ordovician karstic reservoirs in Tazhong andTahe areas[J].Oil and Gas Geology,2005,26(2):202.
[4]王宏语,樊太亮,高志前,等.塔中地区奥陶纪古地貌及其对储集层的控制作用[J].新疆石油地质,2007,28(1):15.WANG Hongyu,FAN Tailiang,GAO Zhiqian,et al.Palaeokarstgeomorphology and its controlling to reservoir in Ordovician atTazhong Area[J].Xinjiang Petroleum Geology,2007,28(1):15.
[5]赵宗举,周新源,陈学时,等.塔中地区中晚奥陶世古潜山岩溶储集层特征[J].新疆石油地质,2006,27(6):660.ZHAO Zongju,ZHOU Xinyuan,CHEN Xueshi,et al.Character-istics of PaleoKarst reservoirs of Middle-Late Ordovician inTazhong Area,Tarim Basin[J].Xinjiang Petroleum Geology,2006,27(6):660.
[6]钱一雄,邹远荣,陈强路,等.塔里木盆地塔中西北部多期、多成因岩溶作用地质-地球化学表征——以中1井为例[J].沉积学报,2005,23(4):596.QIAN Yixiong,ZOU Yuanrong,Chen Qianglu,et al.Geoligicaland geochemical implications for multi-period and origin of car-bonate karstification in the northwestern Tazhong:taking WellZh1 as an example[J].Acat Sedimentologica Sinica,2005,23(4):596.
[7]钱一雄,尤东华.塔中地区西北部奥陶系白云岩(化)成因分析[J].新疆石油地质,2006,27(2):146.QIAN Yixiong,YOU Donghua.An analysis of Ordoviciandolomitisation origin in northwestern Tazhong area[J].XinjiangPetroleum Geology,2006,27(2):146.
[8]牟永光,斐正林,著.三维复杂介质地震数值模拟[M].北京:石油工业出版社,2005.MOU Yongguang,FEI Zhenglin.Seismic numerical modeling for3-D complex media[M].Beijing:Petroleum Industry Press,2005.
[9]董良国,马在田,曹景忠,等.一阶弹性波方程交错网格高阶差分解法[J].地球物理学报,2000,43(3):411.DONG Liangguo,MA Zaitian,CAO Jingzhong,et al.A staggered-gridhigh-order difference method of one-order elastic wave equation[J].Chinese Journal of Ceophysics,2000,43(3):411.
[10]董良国,马在田,曹景忠.一阶弹性波方程交错网格高阶差分解法稳定性研究[J].地球物理学报,2000,43(6):856.DONG Liangguo,MA Zaitian,CAO Jingzhong.A study on sta-bility of the staggered-grid high-order difference method of first-order elastic wave equation[J].Chinese Journal of Ceophysics,2000,43(3):856.
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